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Movement Ecology

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https://www.readbyqxmd.com/read/29318021/linking-seasonal-home-range-size-with-habitat-selection-and-movement-in-a-mountain-ungulate
#1
Duarte S Viana, José Enrique Granados, Paulino Fandos, Jesús M Pérez, Francisco Javier Cano-Manuel, Daniel Burón, Guillermo Fandos, María Ángeles Párraga Aguado, Jordi Figuerola, Ramón C Soriguer
Background: Space use by animals is determined by the interplay between movement and the environment, and is thus mediated by habitat selection, biotic interactions and intrinsic factors of moving individuals. These processes ultimately determine home range size, but their relative contributions and dynamic nature remain less explored. We investigated the role of habitat selection, movement unrelated to habitat selection and intrinsic factors related to sex in driving space use and home range size in Iberian ibex, Capra pyrenaica...
2018: Movement Ecology
https://www.readbyqxmd.com/read/29270295/population-level-plasticity-in-foraging-behavior-of-western-gulls-larus-occidentalis
#2
Scott A Shaffer, Sue Cockerham, Pete Warzybok, Russell W Bradley, Jaime Jahncke, Corey A Clatterbuck, Magali Lucia, Jennifer A Jelincic, Anne L Cassell, Emma C Kelsey, Josh Adams
Background: Plasticity in foraging behavior among individuals, or across populations may reduce competition. As a generalist carnivore, western gulls (Larus occidentalis) consume a wide range of marine and terrestrial foods. However, the foraging patterns and habitat selection (ocean or land) of western gulls is not well understood, despite their ubiquity in coastal California. Here, we used GPS loggers to compare the foraging behavior and habitat use of western gulls breeding at two island colonies in central California...
2017: Movement Ecology
https://www.readbyqxmd.com/read/29225886/correction-to-a-cross-validation-based-approach-for-delimiting-reliable-home-range-estimates
#3
Eric R Dougherty, Colin J Carlson, Jason K Blackburn, Wayne M Getz
[This corrects the article DOI: 10.1186/s40462-017-0110-4.].
2017: Movement Ecology
https://www.readbyqxmd.com/read/29225885/life-history-strategy-resource-dispersion-and-phylogenetic-associations-shape-dispersal-of-a-fig-wasp-community
#4
Vignesh Venkateswaran, Amitabh Shrivastava, Anusha L K Kumble, Renee M Borges
Background: The combined influence of life-history strategy and resource dispersion on dispersal evolution of a biological community, and by extension, on community assemblage, has received sparse attention. Highly specialized fig wasp communities are ideal for addressing this question since the life-history strategies that affect their pace of life and the dispersion of their oviposition resources vary. We compared dispersal capacities of the wasp community of a widespread tropical fig, Ficus racemosa, by measuring flight durations, somatic lipid content and resting metabolic rates...
2017: Movement Ecology
https://www.readbyqxmd.com/read/29201376/quantifying-animal-movement-for-caching-foragers-the-path-identification-index-pii-and-cougars-puma-concolor
#5
Kirsten E Ironside, David J Mattson, Tad Theimer, Brian Jansen, Brandon Holton, Terence Arundel, Michael Peters, Joseph O Sexton, Thomas C Edwards
Background: Many studies of animal movement have focused on directed versus area-restricted movement, which rely on correlations between step-length and turn-angles and on stationarity through time to define behavioral states. Although these approaches might apply well to grazing in patchy landscapes, species that either feed for short periods on large, concentrated food sources or cache food exhibit movements that are difficult to model using the traditional metrics of turn-angle and step-length alone...
2017: Movement Ecology
https://www.readbyqxmd.com/read/29142755/time-versus-energy-minimization-migration-strategy-varies-with-body-size-and-season-in-long-distance-migratory-shorebirds
#6
Meijuan Zhao, Maureen Christie, Jonathan Coleman, Chris Hassell, Ken Gosbell, Simeon Lisovski, Clive Minton, Marcel Klaassen
Background: Migrants have been hypothesised to use different migration strategies between seasons: a time-minimization strategy during their pre-breeding migration towards the breeding grounds and an energy-minimization strategy during their post-breeding migration towards the wintering grounds. Besides season, we propose body size as a key factor in shaping migratory behaviour. Specifically, given that body size is expected to correlate negatively with maximum migration speed and that large birds tend to use more time to complete their annual life-history events (such as moult, breeding and migration), we hypothesise that large-sized species are time stressed all year round...
2017: Movement Ecology
https://www.readbyqxmd.com/read/29085642/the-symbiotic-magnetic-sensing-hypothesis-do-magnetotactic-bacteria-underlie-the-magnetic-sensing-capability-of-animals
#7
Eviatar Natan, Yoni Vortman
The ability to sense Earth's magnetic field has evolved in various taxa. However, despite great efforts to find the 'magnetic-sensor' in vertebrates, the results of these scientific efforts remain inconclusive. A few decades ago, it was found that bacteria, known as magnetotactic bacteria (MTB), can move along a magnetic field using nanometric chain-like structures. Still, it is not fully clear why these bacteria evolved to have this capacity. Thus, while for MTB the 'magnetic-sensor' is known but the adaptive value is still under debate, for metazoa it is the other way around...
2017: Movement Ecology
https://www.readbyqxmd.com/read/29043084/multi-species-genetic-connectivity-in-a-terrestrial-habitat-network
#8
Robby R Marrotte, Jeff Bowman, Michael G C Brown, Chad Cordes, Kimberley Y Morris, Melanie B Prentice, Paul J Wilson
BACKGROUND: Habitat fragmentation reduces genetic connectivity for multiple species, yet conservation efforts tend to rely heavily on single-species connectivity estimates to inform land-use planning. Such conservation activities may benefit from multi-species connectivity estimates, which provide a simple and practical means to mitigate the effects of habitat fragmentation for a larger number of species. To test the validity of a multi-species connectivity model, we used neutral microsatellite genetic datasets of Canada lynx (Lynx canadensis), American marten (Martes americana), fisher (Pekania pennanti), and southern flying squirrel (Glaucomys volans) to evaluate multi-species genetic connectivity across Ontario, Canada...
2017: Movement Ecology
https://www.readbyqxmd.com/read/28944062/coupling-spectral-analysis-and-hidden-markov-models-for-the-segmentation-of-behavioural-patterns
#9
Karine Heerah, Mathieu Woillez, Ronan Fablet, François Garren, Stéphane Martin, Hélène De Pontual
BACKGROUND: Movement pattern variations are reflective of behavioural switches, likely associated with different life history traits in response to the animals' abiotic and biotic environment. Detecting these can provide rich information on the underlying processes driving animal movement patterns. However, extracting these signals from movement time series, requires tools that objectively extract, describe and quantify these behaviours. The inference of behavioural modes from movement patterns has been mainly addressed through hidden Markov models...
2017: Movement Ecology
https://www.readbyqxmd.com/read/28904797/a-cross-validation-based-approach-for-delimiting-reliable-home-range-estimates
#10
Eric R Dougherty, Colin J Carlson, Jason K Blackburn, Wayne M Getz
BACKGROUND: With decreasing costs of GPS telemetry devices, data repositories of animal movement paths are increasing almost exponentially in size. A series of complex statistical tools have been developed in conjunction with this increase in data. Each of these methods offers certain improvements over previously proposed methods, but each has certain assumptions or shortcomings that make its general application difficult. In the case of the recently developed Time Local Convex Hull (T-LoCoH) method, the subjectivity in parameter selection serves as one of the primary impediments to its more widespread use...
2017: Movement Ecology
https://www.readbyqxmd.com/read/28861272/three-dimensional-space-use-during-the-bottom-phase-of-southern-elephant-seal-dives
#11
Yves Le Bras, Joffrey Jouma'a, Christophe Guinet
BACKGROUND: In marine pelagic ecosystems, the spatial distribution of biomass is heterogeneous and dynamic. At large scales, physical processes are the main driving forces of biomass distribution. At fine scales, both biotic and abiotic parameters are likely to be key determinants in the horizontal and vertical distribution of biomass, with direct consequences on the foraging behaviour of diving predators. However, fine scale three-dimensional (3D) spatial interactions between diving predators and their prey are still poorly known...
2017: Movement Ecology
https://www.readbyqxmd.com/read/28861271/no-apparent-gain-from-continuing-migration-for-more-than-3000%C3%A2-kilometres-willow-warblers-breeding-in-denmark-winter-across-the-entire-northern-savannah-as-revealed-by-geolocators
#12
Mathilde Lerche-Jørgensen, Mikkel Willemoes, Anders P Tøttrup, Katherine Rachel Scotchburn Snell, Kasper Thorup
BACKGROUND: For most Afro-Palearctic migrants, particularly small songbirds, spatiotemporal migration schedules and migratory connectivity remain poorly understood. We mapped migration from breeding through winter of one of the smallest Afro-Palearctic migrants, the willow warbler Phylloscopus trochilus, using geolocators (n = 15). RESULTS: Birds migrated from North European breeding grounds to West Africa via the Iberian Peninsula following a narrow corridor along the West Coast of Africa...
2017: Movement Ecology
https://www.readbyqxmd.com/read/28725435/biogeophysical-and-physiological-processes-drive-movement-patterns-in-a-marine-predator
#13
Lucy A Howey, Bradley M Wetherbee, Emily R Tolentino, Mahmood S Shivji
BACKGROUND: Blue sharks (Prionace glauca) are among the most abundant and widely distributed of oceanic elasmobranchs. Millions are taken annually in pelagic longline fisheries and comprise the highest component of auctioned fin weight in the international shark fin trade. Though studies of blue sharks outnumber those of other large pelagic sharks, the species' complicated and sexually segregated life history still confound current understanding of Atlantic movement patterns. Lack of detailed information regarding movement and vertical behavior continues to limit management efforts that require such data for stock assessment and sustainable catch modeling...
2017: Movement Ecology
https://www.readbyqxmd.com/read/28680638/migratory-blackpoll-warblers-setophaga-striata-make-regional-scale-movements-that-are-not-oriented-toward-their-migratory-goal-during-fall
#14
J Morgan Brown, Philip D Taylor
BACKGROUND: Regional scale movement patterns of songbirds are poorly known largely due to difficulties tracking small organisms at broad scales. Using an array of over 100 automated radio telemetry towers, we followed Blackpoll Warblers (Setophaga striata) during fall migration in the Gulf of Maine region, and assessed how their regional scale movement pathways varied with age, distance to natal origin, and capture date. RESULTS: Many individuals had movement paths that were not oriented towards their migratory goal ('indirect movement patterns'), regardless of age, distance to natal origin, or time of season...
2017: Movement Ecology
https://www.readbyqxmd.com/read/28630712/quantifying-drivers-of-wild-pig-movement-across-multiple-spatial-and-temporal-scales
#15
Shannon L Kay, Justin W Fischer, Andrew J Monaghan, James C Beasley, Raoul Boughton, Tyler A Campbell, Susan M Cooper, Stephen S Ditchkoff, Steve B Hartley, John C Kilgo, Samantha M Wisely, A Christy Wyckoff, Kurt C VerCauteren, Kim M Pepin
BACKGROUND: The movement behavior of an animal is determined by extrinsic and intrinsic factors that operate at multiple spatio-temporal scales, yet much of our knowledge of animal movement comes from studies that examine only one or two scales concurrently. Understanding the drivers of animal movement across multiple scales is crucial for understanding the fundamentals of movement ecology, predicting changes in distribution, describing disease dynamics, and identifying efficient methods of wildlife conservation and management...
2017: Movement Ecology
https://www.readbyqxmd.com/read/28580149/suite-of-simple-metrics-reveals-common-movement-syndromes-across-vertebrate-taxa
#16
Briana Abrahms, Dana P Seidel, Eric Dougherty, Elliott L Hazen, Steven J Bograd, Alan M Wilson, J Weldon McNutt, Daniel P Costa, Stephen Blake, Justin S Brashares, Wayne M Getz
BACKGROUND: Because empirical studies of animal movement are most-often site- and species-specific, we lack understanding of the level of consistency in movement patterns across diverse taxa, as well as a framework for quantitatively classifying movement patterns. We aim to address this gap by determining the extent to which statistical signatures of animal movement patterns recur across ecological systems. We assessed a suite of movement metrics derived from GPS trajectories of thirteen marine and terrestrial vertebrate species spanning three taxonomic classes, orders of magnitude in body size, and modes of movement (swimming, flying, walking)...
2017: Movement Ecology
https://www.readbyqxmd.com/read/28496983/correlated-velocity-models-as-a-fundamental-unit-of-animal-movement-synthesis-and-applications
#17
Eliezer Gurarie, Christen H Fleming, William F Fagan, Kristin L Laidre, Jesús Hernández-Pliego, Otso Ovaskainen
BACKGROUND: Continuous time movement models resolve many of the problems with scaling, sampling, and interpretation that affect discrete movement models. They can, however, be challenging to estimate, have been presented in inconsistent ways, and are not widely used. METHODS: We review the literature on integrated Ornstein-Uhlenbeck velocity models and propose four fundamental correlated velocity movement models (CVM's): random, advective, rotational, and rotational-advective...
2017: Movement Ecology
https://www.readbyqxmd.com/read/28484599/to-migrate-stay-put-or-wander-varied-movement-strategies-in-bald-eagles-haliaeetus-leucocephalus
#18
Rachel E Wheat, Stephen B Lewis, Yiwei Wang, Taal Levi, Christopher C Wilmers
BACKGROUND: Quantifying individual variability in movement behavior is critical to understanding population-level patterns in animals. Here, we explore intraspecific variation in movement strategies of bald eagles (Haliaeetus leucocephalus) in the north Pacific, where there is high spatiotemporal resource variability. We tracked 28 bald eagles (five immature, 23 adult) using GPS transmitters between May 2010 and January 2016. RESULTS: We found evidence of four movement strategies among bald eagles in southeastern Alaska and western Canada: breeding individuals that were largely sedentary and remained near nest sites year-round, non-breeding migratory individuals that made regular seasonal travel between northern summer and southern winter ranges, non-breeding localized individuals that displayed fidelity to foraging sites, and non-breeding nomadic individuals with irregular movement...
2017: Movement Ecology
https://www.readbyqxmd.com/read/28469920/continuous-movement-behavior-of-humpback-whales-during-the-breeding-season-in-the-southwest-indian-ocean-on-the-road-again
#19
Violaine Dulau, Patrick Pinet, Ygor Geyer, Jacques Fayan, Philippe Mongin, Guillaume Cottarel, Alexandre Zerbini, Salvatore Cerchio
BACKGROUND: Humpback whales are known to undertake long-distance migration between feeding and breeding sites, but their movement behavior within their breeding range is still poorly known. Satellite telemetry was used to investigate movement of humpback whales during the breeding season and provide further understanding of the breeding ecology and sub-population connectivity within the southwest Indian Ocean (SWIO). Implantable Argos satellite tags were deployed on 15 whales (7 males and 6 females) during the peak of the breeding season in Reunion Island...
2017: Movement Ecology
https://www.readbyqxmd.com/read/28451434/a-few-long-versus-many-short-foraging-trips-different-foraging-strategies-of-lesser-kestrel-sexes-during-breeding
#20
Jesús Hernández-Pliego, Carlos Rodríguez, Javier Bustamante
BACKGROUND: In species with biparental care both members of the breeding pair cooperate to raise the offspring either by assisting each other in every reproductive task or by specializing in different ones. The latter case is known as reproductive role specialization. Raptors are considered one of the most role-specialized groups, but little is known about parental behavior away from the nest. Until the advent of biologgers, avian role specialization was traditionally studied with direct observations at the nest because of the difficulties of following and recording the behavior of free-ranging individuals...
2017: Movement Ecology
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